What should you know about vitamin D and dry eyes?

Dry eye occurs when the tear film does not protect the eye surface adequately. It can cause burning, grittiness, fluctuating vision, watering and sensitivity to wind, air-conditioning or screens. Itchy eyes and red eye can occur with dryness, but they may also reflect allergy, infection, eyelid inflammation or another eye problem.

Vitamin D supports wider body functions, yet a low level does not establish that it caused eye discomfort. Contact-lens use, smoke, some medicines, reduced blinking and eyelid gland problems are common considerations. An eye professional can examine the surface and recommend treatment suited to the cause.

Take regular screen breaks, blink fully, keep direct air from fans or vents away from your eyes and avoid smoke. Preservative-free lubricating drops may help some people; a pharmacist or eye professional can help choose them, especially if you wear contact lenses. Do not use someone else's prescription drops or start vitamin D solely for eye symptoms.

Arrange a GP consultation or eye review if symptoms keep returning, affect reading or driving, or do not settle with simple measures. Bring your medicines, contact-lens details and any supplement labels.

Seek urgent eye care for severe pain, sudden vision loss, marked light sensitivity, an injury, chemical exposure, a very red eye with nausea, or redness and pain while wearing contact lenses. Prompt assessment is also needed for new persistent blurred vision or discharge.

Could my symptoms be allergy, infection, eyelid inflammation or dry eye? Do I need an eye examination or GP consultation? Which lubricating drops suit my contact lenses and medicines? Is vitamin D testing relevant to my wider health?